Canadian Adam Svensson earned a one-stroke lead after round one of the Sony Open in Hawaii, where Jordan Spieth stumbled in his first appearance of the season.
Svensson carded a nine-under-par 61 – highlighted by seven birdies and one eagle – to top the leaderboard at Wai'alae Country Club in Honolulu on Thursday.
The 25-year-old, whose best finish last season was a tie for 39th, was trailing clubhouse-leader Andrew Putnam but leapfrogged him after four consecutive birdies on the back nine and one final one on the par-five 18th hole.
American Putnam has sole possession of second place following his first-round 62 at the PGA Tour tournament, while Matt Kuchar (63) is a stroke further back.
A handful of golfers are tied inside the top 10, including Brandt Snedeker, Jason Dufner and Cameron Smith, who are in a seven-way tie for seventh place after shooting 66s.
Justin Thomas – the 2017 champion – did not have much luck late, but when it did come it was certainly exciting following three-under-par 67.
The nine-time tour winner was flawless on the front nine. He opened with a birdie on the par-four first hole and carded another birdie just three holes later.
Before he made the turn, Thomas rolled in a 12-foot putt for an eagle on the 9th hole. But, the back nine was a different story.
Thomas had four bogeys, three of which were sandwiched in between one more birdie and an eagle to close out the round.
He found a bunker on the par-five 18th hole and looked as if he might finish with yet another bogey. However, his bunker shot got the perfect bounce off the green and one more off the flagstick for an impressive ending.
Marc Leishman, Davis Love III and defending champion Patton Kizzire ended the day level alongside Thomas in 17th place.
American star Spieth, meanwhile, struggled after opening the tournament with a three-over-par 73.
It was a difficult day for 11-time PGA Tour champion Spieth, who had four bogeys and just one birdie to be tied for 127th and 12 shots off the pace.
23. Januar 2019
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|Martinez leaves Arsenal for Reading loan|
|Beckham becomes Salford City shareholder|
|Maradona hopes Sala will be found alive|
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|Higuain and Piatek on the move on busy day for Milan|
|Philippe and Vince humble the Hurricanes|
|Nishikori: I couldn´t beat anybody on one leg|
|Boateng poised for debut as Barcelona axe Suarez|
|Shami sets record in crushing win after sun stops play|
|Sala search focused on possible use of life raft|
|Pouille exceeds own expectations with run to Aus Open semis|
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|A golden boy, a guy you want to love - Delecroix pays emotional tribute to Sala|
|Richardson, Patterson to make Australia debuts against Sri Lanka|
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|Pouille upsets Raonic to reach Australian Open semis|
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|Anthony ´can only make´ a team better, says Iverson|
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|Osaka powers past Svitolina in Melbourne|
|Harden on Anthony trade: It kind of sucks that it didn´t work out|
|Redskins remain ´optimistic´ QB Alex Smith will play again|
|Patriots coach Belichick says Rams´ Donald is ´pretty much unblockable´|
|PSG fined €100,000 by LFP over player-recruitment practices|
|I´m not his father - Guardiola demands Mendy matures|
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22. Januar 2019
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|Otamendi not happy at Man City, says Guardiola|
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|Henry´s Monaco dumped out of Coupe de France|
|Qatar can win Asian Cup, says Sanchez|
|Tim Howard to retire following 2019 MLS season|
|Koscielny backs Bellerin to return from injury ´stronger than before´|
|Chiefs fire DC Bob Sutton after AFC Championship loss to Patriots|
|Reyes returns to Spain with second-tier strugglers Extremadura|
|Emiliano Sala: Profile of Cardiff City striker missing after joining from Nantes|
|Messi rested for Sevilla trip, Boateng set for debut|
|Nuno fined over pitch celebration in Leicester win|
|Nadal unfazed by another Next Gen opponent in Tsitsipas|
|Ulster hand lifetime ban to spectator after Zebo abuse|
|Phehlukwayo´s career-best day inspires Proteas against Pakistan|
|Bournemouth pounce for Brentford´s Mepham|
|You say all signings are controversial – Valverde defends Boateng arrival|
|Search for missing Sala plane suspended|
|Kohli and Williamson display mutual respect as India and Black Caps prepare for battle|
|Qatar 1 Iraq 0: Al Rawi free-kick books quarter-final spot|
|Ba joins Adebayor and Robinho at Istanbul Basaksehir|
|BREAKING NEWS: Tottenham´s Alli out until March with hamstring injury|
|Fit-again Joseph added to England squad|
|It is very, very serious for us - Tuchel wants midfielder in January window|
|Lakers expect Rajon Rondo back Thursday as LeBron James continues rehab|
|Atletico Madrid boosted as Koke thigh injury revealed to be minor|
|South Korea 2 Bahrain 1 (after extra time): Kim Jin-su seals quarter-final spot|
|AC Milan confirm Zapata thigh injury|
|I miss him a lot - Guardiola confirms ´clever´ Mendy back in Man City squad|